Abstract
This paper describes the effect of arrangement and area of floor well to vibration characteristics of two storied wooden houses with the same side eccentricity in 1st and 2nd floors and ones with the opposite side eccentricity in each floor by means of shaking table tests. This effect of arrangement and area of floor well includes the effect of mass eccentricity. Therefore the effects of these factors are examined separately by using different three series of full scale specimens. The main results obtained by these experiments are as follows. In case of same side eccentricity translation is small and torsion is large, on the contrary in case of opposite side eccentricity translation is large and torsion is small. From the specimen series (a) prepared to investigate the effect of arrangement and area of floor well, installing strong wall outside of floor well torsion decreases in case of same side eccentricity and translation decreases in case of opposite side eccentricity. From the specimen series (b) prepared to investigate the effect of mass eccentricity, installing weak wall outside of floor well torsion and translation decrease in case of same side eccentricity, installing strong wall torsion decreases in case of opposite side eccentricity. From the specimen series (a) to (c) the torsional characteristics of general type of existing wooden houses with floor well are mainly influenced by mass eccentricity and partialy influenced by floor well type.
